View source for 8hnr


==Molecular structure of Kunitz-type trypsin inhibitor from seeds of Albizia procera==
<StructureSection load='8hnr' size='340' side='right'caption='[[8hnr]], [[Resolution|resolution]] 1.42&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8hnr]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Albizia_procera Albizia procera]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8HNR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8HNR FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.42&#8491;</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8hnr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8hnr OCA], [https://pdbe.org/8hnr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8hnr RCSB], [https://www.ebi.ac.uk/pdbsum/8hnr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8hnr ProSAT]</span></td></tr>
</table>
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== Publication Abstract from PubMed ==
Trypsin inhibitors are known to act against insect pests by inhibiting proteases of the digestive tract. In this study, we report structural and functional characterization of approximately 19 kDa Albizia procera Kunitz-type trypsin inhibitor (ApKTI) protein with potential bio-insecticidal applications. Crystal structure of ApKTI protein has been refined to 1.42 A and molecular structure (8HNR) showed highly beta sheeted conformation including 12 beta sheets, 15 loops and two small alpha helices. Docking between predicted model of Tribolium castaneum trypsin (TcPT) and 8HNR produced a stable complex (-11.3 kcal/mol) which reflects the inhibitory potential of ApKTI against insect gut trypsin. Significant mortality was observed in all life stages of T. castaneum including egg, larvae, pupae and adults with a 3.0 mg native ApKTI treatment in comparison to negative control. Although standard trypsin inhibitor (Glycine max trypsin inhibitors; GmKTI; 3.0 mg) produced maximum reduction against all above life stages; however, a non-significant mortality difference was observed in comparison to 3.0 mg native ApKTI. The study further explores the synthesis and characterization of Graphene (GNPs) and Zinc oxide (ZnONPs) nanoparticles, followed by the optimization of ApKTI and GmKTI loading on both nanoparticles to evaluate their enhanced insecticidal effectiveness. Encapsulated proteins showed significant mortality against T. castaneum across all concentrations, with GNPs proving more effective than ZnONPs. Additionally, encapsulated GmKTI produced significant mortality of eggs compared to loaded ApKTI treatments while other life stages were non-significantly affected by two proteins. This research highlights the importance of encapsulated ApKTI protein for eco-friendly pest management strategies.

Crystal structure of Kunitz-type trypsin inhibitor: Entomotoxic effect of native and encapsulated protein targeting gut trypsin of Tribolium castaneum Herbst.,Mehmood S, Thirup SS, Ahmed S, Bashir N, Saeed A, Rafiq M, Saeed Q, Najam-Ul-Haq M, Khaliq B, Ibrahim M, Alonazi WB, Akrem A Comput Struct Biotechnol J. 2024 Aug 3;23:3132-3142. doi: , 10.1016/j.csbj.2024.07.023. eCollection 2024 Dec. PMID:39229336<ref>PMID:39229336</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 8hnr" style="background-color:#fffaf0;"></div>

==See Also==
*[[Trypsin inhibitor 3D structures|Trypsin inhibitor 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Albizia procera]]
[[Category: Large Structures]]
[[Category: Akrem A]]
[[Category: Khaliq B]]
[[Category: Mehmood S]]
[[Category: Rafiq M]]
[[Category: Saeed A]]
[[Category: Thirup SS]]